Notes On the Aquatic Insects of Walnut Lake: With Especial Reference to a ...
Notes On the Aquatic Insects of Walnut Lake: With Especial Reference to a ...
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Last of all tiie visible performers, Heptagenia, appears when it is almost to Digitized by Google 262 MICHIGAN SURVEY, 1907.
dark to see, in small companies of males, which weave up and down obliquely, flying forward and upward, head to wind, and drifting and settling downward and backward to the starting point. How high these go could hardly be told on the several occasions when I watched them, the white forms being little visible against the sky (one could see them but a few feet) but they de...scend to a level easily within reach of a net. Whether females come near these swarms when in search of mates I was wholly unable to observe. Detailed knowledge of the mating and ovipositing habits of this species will be gleaned with great difficulty. A search light which we brought into requisition at station 1 was of no practical assistance in observing any of the flights above described.
I reared this species at Saranac Inn, N. Y., in 1900, and published a de- scription of the larvae in Bull.
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To quickly assess the difficulty of the text, read a short excerpt:
Last of all tiie visible performers, Heptagenia, appears when it is almost to Digitized by Google 262 MICHIGAN SURVEY, 1907.
dark to see, in small companies of males, which weave up and down obliquely, flying forward and upward, head to wind, and drifting and settling downward and backward to the starting point. How high these go could hardly be told on the several occasions when I watched them, the white forms being little visible against the sky (one could see them but a few feet) but they de...scend to a level easily within reach of a net. Whether females come near these swarms when in search of mates I was wholly unable to observe. Detailed knowledge of the mating and ovipositing habits of this species will be gleaned with great difficulty. A search light which we brought into requisition at station 1 was of no practical assistance in observing any of the flights above described.
I reared this species at Saranac Inn, N. Y., in 1900, and published a de- scription of the larvae in Bull.
What to read after Notes On the Aquatic Insects of Walnut Lake: With Especial Reference to a ...?
You can find similar books in the "Read Also" column, or choose other free books by James George Needham to read onlineMoreLess
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